Air purifier



FIG. 1 is a perspective view of an air purifier showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a right side elevation view thereof; and,

FIG. 8 is a cross-sectional view thereof along the line 8-8 in FIG. 2.

The broken lines depict portions of the air purifier that form no partof claimed design.

CLAIM The ornamental design for an air purifier, as shown and described.